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09.07.2019 •
Mathematics
Find two numbers such that the smaller subtracted from the larger is 9 and the difference of the square of the larger subtracted from square of the smaller is 9
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Ответ:
GIVEN - The subtraction of the smaller number from the larger number be 9.
The subtraction of the square of the smaller number from the square larger number be 9.
Find the number
to proof =
let larger number be x
and let the smaller number be y
and the second equation becomes
by using the equation
we have
now put this in the above equation we get
thus we have
(x-y) (x+y) = 9
as we have (x-y) =9
put in the above equation
we get
(x + y ) =1
by solving the equation (x + y ) = 1 & (x - y) = 9
we get x = 5 & y = -4
Hence proved
Ответ:
The population is the main group the survey is about. In this case, it is about the school. However, his sample was just the football team.